[PATCH v3 4/5] ASoC: Intel: atom: Use scoped_guard() for scoped locking

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

Clean up the code using scoped_guard() for mutex locks.
Merely code refactoring, and no behavior change.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/intel/atom/sst-atom-controls.c     | 38 ++++++++++----------
 sound/soc/intel/atom/sst-mfld-platform-pcm.c | 20 ++++-------
 2 files changed, 27 insertions(+), 31 deletions(-)

diff --git a/sound/soc/intel/atom/sst-atom-controls.c b/sound/soc/intel/atom/sst-atom-controls.c
index 3629ceaaac17..6f3a0646f6a0 100644
--- a/sound/soc/intel/atom/sst-atom-controls.c
+++ b/sound/soc/intel/atom/sst-atom-controls.c
@@ -761,27 +761,29 @@ int sst_handle_vb_timer(struct snd_soc_dai *dai, bool enable)
 			return ret;
 	}
 
-	mutex_lock(&drv->lock);
-	if (enable)
-		timer_usage++;
-	else
-		timer_usage--;
-
-	/*
-	 * Send the command only if this call is the first enable or last
-	 * disable
-	 */
-	if ((enable && (timer_usage == 1)) ||
-	    (!enable && (timer_usage == 0))) {
-		ret = sst_fill_and_send_cmd_unlocked(drv, SST_IPC_IA_CMD,
-				SST_FLAG_BLOCKED, SST_TASK_SBA, 0, &cmd,
-				sizeof(cmd.header) + cmd.header.length);
-		if (ret && enable) {
+	scoped_guard(mutex, &drv->lock) {
+		if (enable)
+			timer_usage++;
+		else
 			timer_usage--;
-			enable  = false;
+
+		/*
+		 * Send the command only if this call is the first enable or last
+		 * disable
+		 */
+		if ((enable && timer_usage == 1) ||
+		    (!enable && timer_usage == 0)) {
+			ret = sst_fill_and_send_cmd_unlocked(drv, SST_IPC_IA_CMD,
+							     SST_FLAG_BLOCKED,
+							     SST_TASK_SBA, 0, &cmd,
+							     sizeof(cmd.header) +
+							     cmd.header.length);
+			if (ret && enable) {
+				timer_usage--;
+				enable  = false;
+			}
 		}
 	}
-	mutex_unlock(&drv->lock);
 
 	if (!enable)
 		sst->ops->power(sst->dev, false);
diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
index 47823443354c..f679258a030e 100644
--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -312,15 +312,14 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 	spin_lock_init(&stream->status_lock);
 
 	/* get the sst ops */
-	mutex_lock(&sst_lock);
-	if (!sst ||
-	    !try_module_get(sst->dev->driver->owner)) {
-		dev_err(dai->dev, "no device available to run\n");
-		ret_val = -ENODEV;
-		goto out_ops;
+	scoped_guard(mutex, &sst_lock) {
+		if (!sst ||
+		    !try_module_get(sst->dev->driver->owner)) {
+			dev_err(dai->dev, "no device available to run\n");
+			return -ENODEV;
+		}
+		stream->ops = sst->ops;
 	}
-	stream->ops = sst->ops;
-	mutex_unlock(&sst_lock);
 
 	stream->stream_info.str_id = 0;
 
@@ -355,11 +354,6 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 
 	stream = NULL;
 
-	return ret_val;
-
-out_ops:
-	mutex_unlock(&sst_lock);
-
 	return ret_val;
 }
 
-- 
2.43.0